POLYESTER GLASS CASTING RESIN This transparent, polyester resin is used for encapsulating normal dry objects such as shells, stones, coins, glass balls and model toys. The resin hardens with the addition of a paste hardener and is therefore favourable for use by children (from age 10) and young people, under the supervision of a parent or teacher. Resin is also suitable for making jewellery and for this purpose can be used with the resin toning colours. In many schools, working with this special resin is considered as an introduction to chemistry in everyday application. Instructions for use are on the label. Available in 500ml and 1 Litre cans.